Many of the Barovier & Toso earlier (c. 1950) birds had the swollen brow look. I used to think it looked awful, but now I see the same brow as an indicator that it might be B&T. Robbo's bird is not Oball. It is too carefully made and looks too good. Oball birds are okay, but not as nice as the old quality Murano birds. I've not see Oball do bullicante like robbo's bird. So I think we can cross them off the list of possibilities. Robbo's bird looks vintage to me and is a good bird.